/**
* Slugify a string
*
* Simplified slugify that only passes in alphanumeric characters, and replaces runs of others with dashes.
* Also only allows alphanumeric characters on start and end.
* The result is usable as a part of DNS domain name.
*/
public static function slugify($string, $maxLength = 255, $hashLength = 6)
{
mb_regex_encoding('UTF-8');
$hash = mb_substr(hash('sha256', $string), 0, (int) $hashLength);
$sanitized = static::sanitize($string);
$sanitized = static::maxLength($sanitized, (int) $maxLength - ($hashLength ? (int) $hashLength + 1 : 0));
$sanitized = static::trimNonAlnumEnds($sanitized);
// Add partial hash in order to prevent empty or duplicate slugs
$sanitized = implode('-', _::filter([$sanitized, $hash]));
return $sanitized;
}
function _filter($list, $iterator = NULL, $context = NULL)
{
return Underscore::filter($list, $iterator, $context);
}
/**
* @tags collections
*/
public function testFilter()
{
$even = function ($v) {
return !($v & 1);
};
// the truth test should be optionnal
$this->variable(_::filter([1, 0, 2, null, 3, false, 4, "0"]))->isEqualTo([0 => 1, 2 => 2, 4 => 3, 6 => 4]);
// it should work with arrays, objects and iterators
$this->typeTolerant([1, 2, 3, 4], [1 => 2, 3 => 4], function ($in, $out) use($even) {
$this->array(_::filter($in, $even))->isEqualTo($out);
}, [0, -1]);
// it should preserve associativity and order
$this->variable(_::filter(['a' => 1, 9 => 2, null => 3, 0.2 => 4], $even))->isEqualTo([9 => 2, 0.2 => 4]);
// it should be possible to specify a context for the thruth test
$this->variable(_::filter([1, 2, 3, 4], function ($v) {
return $v % $this->mod == 0;
}, (object) ['mod' => 2]))->isEqualTo([1 => 2, 3 => 4]);
// it should return an empty array if no item passes the truth test
$this->array(_::filter([1, 3, 5, 7], $even))->hasSize(0);
}
